.right_content .panel-body{
    padding:10%;
}
.nav_item{
    margin:0 75px;
}
.nav_item_content{
    display: block;
    width:100%;
    height:100%;
    padding:20px;
    box-sizing: border-box;
    border: 1px solid #eee;
    border-radius: 8px;
    text-decoration: none;
    color: #666;
}
.nav_item_content:hover{
    color: #337ab7;
    text-decoration: none;
    box-shadow: 0px 0px 3px 2px #888888;
}



@media screen and (max-width: 440px) {
    .nav_item_content{
        padding:10px;
    }
    .nav_item_content>h4{
        font-size: 12px;
    }
    .nav_item{
        margin:0 0 10px 0;
    }
}